. >> president obama addressed the nation shortly after 3:00 this afternoon our time. as we just noted the fbi is running this investigation and the president says the full federal government will be used to find the person responsible for this attack. we have more from chief investigative reporter tony kovaleski. i know you spend the day talking to your federal law enforcement sources across the country. >> we are hearing there was no active specific target in california that is receiving special attention but everyone stresses that all agencies remain on high alert status. one of the early keys is the fact that they did recover at least one device that did not detonate. that is key because they are skilled at reverse engineering these devices. we are told the sophistication will help determine the potential suspect or suspects. you can bet they are combing through every piece of video and video cameras in that area. federal agents are currently running down leads internationally and domestically and two sources said today is also tax day. we also confirmed there is n